GB/T 26459-2011 English PDFUS$139.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 26459-2011: Pulp, paper and board -- Determination of the post color number Status: Valid
Basic dataStandard ID: GB/T 26459-2011 (GB/T26459-2011)Description (Translated English): Pulp, paper and board -- Determination of the post color number Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: Y30 Classification of International Standard: 85-010 Word Count Estimation: 6,680 Date of Issue: 2011-05-12 Date of Implementation: 2011-09-15 Quoted Standard: GB/T 450; GB/T 740; GB/T 7973; GB/T 7974; GB/T 24324 Regulation (derived from): Announcement of Newly Approved National Standards No. 6 of 2011 Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China Summary: This standard specifies based on Kubelka-Munk theory, by measuring paper, board and pulp light scattering coefficient and absorption coefficient obtained yellowing values. This standard applies to white and near white sheet of paper, paperboard and pulp, not to contain fluorescent brighteners paper, paperboard and pulp. GB/T 26459-2011: Pulp, paper and board -- Determination of the post color number---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.Pulp, paper and board. Determination of the post color number ICS 85-010 Y30 National Standards of People's Republic of China Paper, board and pulp yellowing value Issued on. 2011-05-12 2011-09-15 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordThe standard proposed by China National Light Industry Council. The standard paper by the National Standardization Technical Committee (SAC/TC141) centralized. This standard was drafted. China Pulp and Paper Research Institute, Shandong Huatai Paper Co., Ltd., the national paper quality supervision and inspection center, China Paper Association Professional Committee of Standardization. The main drafters of this standard. Zhangqing Wen, Gao Jun. Paper, board and pulp yellowing value1 ScopeThis standard is based on the provisions of the Kubelka-Munk theory, by measuring paper, paperboard and pulp light scattering coefficient and light absorption coefficients Yellowing value method. This standard applies to white and near white paper, paperboard and pulp, does not apply to paper, paperboard and pulp containing fluorescent brighteners.2 Normative referencesThe following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. Latitude and take samples to GB/T 450 paper and paperboard samples, positive and negative determination GB/T 740 pulp samples taken GB/T 7973 paper, board and pulp - Determination of diffuse reflectance factor (diffusion/vertical method) GB/T 7974 paper, paperboard and pulp brightness (whiteness) measured diffusion/vertical method GB/T 24324 Pulp physical testing laboratory sheets prepared by conventional sheet former method3 Terms and DefinitionsThe following terms and definitions apply to this standard. 3.1 Reflection factor R reflectancefactor By a flux of radiation reflected from an object under the same conditions perfectly reflecting diffuser reflected ratio of radiation flux, expressed as a percentage. 3.2 Internal reflection factor R∞ intrinsicluminousreflectancefactor Sample layers to achieve opaque, that the measurement result is no longer doubled light reflection factor and change with time of sample layers. 3.3 Light scattering coefficient S lightscatteringcoefficient Light passes through the diffusion flux partially reflected infinite sheet material, the application of Kubelka-Munk theory and there is this part of the luminous flux Reflective material layer thickness limit of light-dependent, and taking into account the quantitative relationship between material, units of m2/kg. 3.4 Light absorption coefficient K lightabsorptioncoefficient Light passes through the diffusion flux partially absorbed by the infinite sheet material, the application of Kubelka-Munk theory and there is this part of the luminous flux Absorption edge thickness of the material layer is light-dependent, and taking into account the quantitative relationship between material, units of m2/kg. 3.5 Yellowing value postcolornumber After a certain storage time a sample of the affected environment or other factors appear whiteness decline, a phenomenon known as reversion. Yellowing process Degree with a return value indicates yellow, also known as the PC value. Principle 4 Application of Kubelka-Munk theory, the measured light scattering coefficient and absorption coefficient of the sample before and after aging, yellowing calculated value. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 26459-2011_English be delivered?Answer: Upon your order, we will start to translate GB/T 26459-2011_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 26459-2011_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 26459-2011_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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